#include<iostream>
using namespace std;
int N;
long X,Y,A[2<<17];
int P[2<<17];
main()
{
	cin>>N>>A[0]>>Y;
	for(int i=1;i<=N;i++)
	{
		cin>>A[i];
		P[i]=3;
	}
	long x=Y,y=0;
	for(int i=N;i>=0;i--)
	{
		if(A[i]&~(x|y))
		{
			if(x&~A[i])
			{
				cout<<-1<<endl;
				return 0;
			}
			P[i]=1;
			y|=~A[i];
		}
		else
		{
			P[i]=2;
			x&=~A[i];
			y|=A[i];
			if(x==0)
			{
				P[i]=3;
				break;
			}
		}
	}
	if(x!=0)cout<<-1<<endl;
	else
	{
		for(int i=1;i<=N;i++)cout<<P[i]<<(i==N?"\n":" ");
	}
}